<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
    h1{color: #ff0000}
    h2{color: #f0f}
    h3{color: rgb(255,0,0)}
    h3{color: rgba(255,0,0,0.2)}
    #d2 {
        background-color: purple;
        width: 200px;
        height: 200px;
        background-image: url("../作业.png");
        background-size: 100px 100px;
        background-repeat: no-repeat; /*禁止重复*/
        /*背景图片位置： 横向 纵向*/
        /*background-position: 50px 50px;*/
        background-position: 0% 100%;
    }
        #d1{
        width:611px;
        height:376px;
            background-color:#e8e8e8;
            background-image: url("http://doc.canglaoshi.org/tstore_v1/images/itemCat/study_computer_img1.png");
            background-repeat: no-repeat;
            background-size: 318px  319px;
            background-position: 90% 80%;
    }
</style>
<body>
<div id="d1"></div>
<div id="d2">背景图片测试</div>
<h1>颜色测试</h1><h2>颜色测试</h2><h3>颜色测试</h3><h4>颜色测试</h4>

</body>
</html>